Pipe-cutter.



l. W NONNEMAN.

PIPE CUTTER.

APPLICATION HLED FER. 2, 19l8.

Patented Oct. 22, 1918.

2 SHEETS-SHEET 1 I. W. NONNEMAN.

PIPE CUTTER.

APPLICATION FILED 28.2. 1918.

2 SHEETS-SHEET 2.

urna. wuumnmn n c Patented Oct. 22, 1918.

an mina IRA W. NONNEMAN, on WA nnnn, on;o, Assien ion TOTHE ORDENCOMPANY, on WARREN, OHIO, A CORPORATION on OHIO'.

PIPE-CUTTER.

Specification of Letters Patent.

Patentad oct. 22, mm.

pplicatin filed ebrnary 2', 1918. Sefial ive. 215,015.

T0 au wwm it may coitcem: 7 V

Be it known that I, IRA W. NNNEMAN, a citize1i of the United States,residing at Varren, in the connty of Truinbiill and State of Ohio, haveinvented a certain new and nseiul Improvement in Pipe-Cutters, of whichthe following is a ull, clear, and exact description, reference beinghad to the accompanying drawings.

This invention relates to Pipe cutters,having the knife fed to the Workaspr ng pressure, thns avoiding the pe11od1c screw feeding of the knifeand the consequent 1ri'egularity in the out, and enablingtlie cutter tomake a clean out through the ,p1pe simply by the continuons rotation; ofthe tool. The object of the invention is to provide such a tool i1iaform shall be simple in construction, in which the: spring shall beefi:'cctively housed, and elogg ngpy chips is avoided.- Tlie inventionhei e 1n after more fully enplained in connect on with the accomPanyingdrawings, and the essential characteristics are set ont in the claims.Tlie drawings illustrat the invention einbodied in a duplex cutter,Figure 1 is an edge view Q such a cutter; Fig. 2 is a side elevationthereof; Figsq 3, and ai sctions on' an enlarged scale through one ofthe housings for the sp1 ingand knife, F 3 being sectioned in a planeparallel with Fig. 2, Fig. 4 in aplane parallel With Fig. 1, and Fig. 5being a transverse section indicated by the line 5- 5 011 Fig. 4. 6 is afragmentary el'evaJtion on the same scalewith Fig. 2 and loki1ig fromthe opposite direction and showing the guide blocks in orkingengagement.

As shown, the frame of the cutte1consists of two stationa1y e1idb1a'ckets 10 and 11 and a rigid connetion between tlnem consistirig'oftwo paiztlll bars 12 and l3rigidly comiected to tlie biackets, asbyrivets shox vn at 14 and 15. 20 indicats"a movable bracket Which has atongue 21 extencling into the space betweeri thebrs 12 and 13 and guidedin that space by reason of a groove inoi1e sicle of the tongue which isoccupied by a key 16 seateclin the bar 13.

In the construction showri, the 1noVable bracket is put in place beforethe rivets 14 and ,15 are sered, and,thei1 the upsettig of these rivetsefictivly retains the parts in place, This particlar construction ofpipe-cuttei" frame is not claiflied herein, but in iny pendingjapplication No. 147,420, filed February 8, 1917.

Each of the brackets 10 and 20 carries 01 is formed into a housing forthe pipeguide, knife and feding sPring, as liereinafter more fullyexplaiiied. The guide 50 and lmife 40 are brQuglit into engagement Witha pipe foi instance, the pipe A in Figs.

1 and 2) by the 1*otationof a screw 30, which threaded in the bracket 11and has a sxivel Coin1ecti0n at 31, Fig. 4, in a boss 97 formed on them'ovable biacket 20,

The bracket 10 carries a socket l8 for the reception of the litindle 19,but with the" eX C'epti0n 0:E the external connections the tWo br2icketsor housi1igs 10 and 20 are iden tical and theiefoie the description ofthe hbsing 20, as shown particnlar ly in Figs. 3, 4. and 5, Will applyequally Well to the sta tionarjrhoiising 10. H H As shown in Figsl 3, 4:and 5, thehoing 20 comprises a rectatngular box having a base or bzick25, side walls 26 and an end portion 27 in Which the"end of thescreW 30is swiveled. A covef plate 1*ests on the walls 26 and extnds at 56 ovefthif outer ends into close engagement With the boss E27. Tliis cover iss'hovn as secured by screws 57.

I*nclosed Within the housing; and slidably engging its walls and baseand cover 55 is a block 44 which has a cylincltical recess 45 in vvh ichseats a helical spring 48 coin. pressed between the base of the1ecessand the boss 27 of the housing. The knife 40 is rigidly secured tothe block l4 as by SCIGWS 46 extending through the knife. This'knife islocated just behind au opening 58 in the cOver plate, so that the screwsare readily accessible and the lmifeinay be re moved thfough suchopening. However, the edge of the knife comes close enough' to the 'edgeof the opening so that no chips can Worliaround the knife into theinterior of the housing.

The guide 50 Which engages the pipe and as b y screws This plate,therei'o1e, has. the double function of acting the pipe guide and as theend closure of the housing. 'ihe plate 15 reinforced on the inner sideby the boss 53, and the slidable block tat is correspondingiy recessedat 49 to receive the boss, and has its end inclined corresponding to theincline of the inner face of the plate 50, as shown in Fig. 4.

The construction described makes the end plate very strong to resist thestrain if the tool be screwed tight on a pipe. The slidable block has asuflicient size to be easily and accurateiy guided by the inner faces ofthe housing. At the same time the construction is compact, and thehousing may be comparatively small.

VVhen the tool stands idie, the extended spring 48 maintains the block44L resting against the inner face of the pipe guide 50. Thi positionholds the cutting edges of the knife a considorabie distance nearer theaxis of the pipe than the pipe guides 50. When the tool is put to work,the screw 30 is turned (as, for instance, by the handle 32) feeding thehousing 20 toward the houein 10. As the knives 4:0 engage the pipe theyare orced back, the springs 48 being c0mpressed as the housings continueto approach each other. This unseated position of the tool isillustrated in Figs. 1 and 2, where the knives have engaged the pipe;but the housings have not yet been brought together close enough foroperation.

VVhen the pipe guides 50 are brought int0 engagement with the pipe bythe continued V approach of the housinge, as shown in Figs.

3, 4: and 6, the device is ready for operation. During the operation,all that is necessary is to turn the tool about the axis of the pipe, asthe cutters are continuously fed into the pipe by the action of thesprings 5L8. It should be noted that each cutter has a cut ting edge 41and a stopping shoulder 42 which Iimits the cutting action and preventsthe knife digging into the pipe faste than it can cut.

VVhenever it is desired to remove the knives for sharpening, or tosubstitute other knives, this is easily accomplished by tak ing out thescrews 46, the knife being readily removabie through the opening 58. Byhaving the pipe guide in the form of a solid block 50 rigidly carried bythe hous ing, I obtain an accurate guidingof the tool on the pipe, whileby using the guide support as an inclosing housing for the spring andthe sliding block which carries the knife, I prevent any clogging bydirt o1 chips getting on the s]iding surface a1ong which the blockmoves. 1V[aking the end members of the housings the pipe guides,

- renders the tool more compact and of an easier shape to carry andhandle than if the guides were extended on the side. Ac-

ces to the interior of the housing may be had whenevet necessary byremoving the screws 52.

I-Iaving thus dcscribed my invention what I clailn is 1. In a tool ofthecharacter described, the co1nbination, With a ramc, of a housing carriedthereby, a block within the housing slidable therein, a spring acting onthe block, said honsing having an end closure which :Eonns also a guidefor the pipe, and a knife carried by the housing.

2. In a pipe cutting tool, the combination of a f1ame, means carriedthereby for en gaging the pipe on one side, a boxlike housing 1nonntedon the frame, a block movable Within the housing, a knife carried bysaid block at one side thereoi, and a spring within the housing forcingthe knife toward the pipe, therc being a rigid end member for thehousing alining With the block and forming also a guide for the pipe,said end inember and knife being adapted to engage combination, with aframe, of a housing rigidly carried thereby, a housing slidably carriedthereby, each housing having an end. closure adapted to form a pipeguide and 'having an internal block, a spring in each housing pressingthe block toward the pipe, and a knife secured at the side of each blockand adapted toengage the pipe. 4

5. In a tool of the character described, the combination with a frame,of a housing carried thereby, an end inember for the housing having aV-shaped gfroove in its outer face and a reinf0rcing boss on its innerface, a slidable block Within the housing having a recess to receivesuch boss, a spring acting on the block, and a knife at the side of thehousing secured to the block.

6. In a tool of the character described, the combination, with a frame,of a housing carried thereby, an end member for the bousing having aV-shaped groove in its outer face, a slidable block within the housinghaving a recess in its outer face, a spring within block, and a knifesecured to the block.

7. In a tool of the character described, the

combination With a rame, of a housing car 11ed thereby and compr1s1ng aback portion and s1de walls, an end member for the housing formed to actalso as a pipe guide, a block slidable within the h0using, a springacting on the block, a knife removably secured to the block, and a coverplate for the face of the housing havng an opening through which theknife securing devices are accessible.

8. In a tool of the characjer described, the combination, With a frame,of a honsing rigidly carried thereby5 a housing slidably car riedthereby, each} housing comprising a back portion and side walls and anend member having a V-shaped outer face to act as a pipe guide, a blockslidable within each housing, a spring acting on each block, a kniferemovably secured to each block, a cover plate for the face of eachhousing having an Opening thr0ugh Which the knifesecuring devices areaccessible, and means for m0ving the slidable housing toward or from therigid housing.

9. In a tool of the character described, the combination, With a frame,of a box-like hollow h0using carried thereby and having parallel walls,a block within the housing slidably guided by 'said walls, a knifesecured to the side of the block, and a plate held against ends of thehousing Walls and forniing a closure for thehousing and serv ing also asa guide for the pipe.

10. In a tool of the character described, the combination, with a frame,of a housing carried thereby and comprising a rectangular box havingrigid Side walls and an end adapted to be opened, a plate nonnallyclosing said end and secured to the side Walls and having a V-shapedgroove in the onter face adapted to constitute a pipe guide, a blockslidable within the housing and engaging the side walls thereof, aspring within the housing bearing against said block, and a knifesecured to the side of the block and extending across the edge of theend plate and adapted to engage the pipe.

In testimony whereof I herennto afiix my signature.

IRA W. NONNEMAN.

Copies of this patent may be obtained for flve cents each, by addressingthe Commissioner of Patents. Washington, D, C.

